CN116021645A - Feeding structure of cement mixer - Google Patents

Abstract

The invention relates to the technical field of cement mixing, in particular to a feed structure of a cement mixer, including a limit bracket, a bearing ring seat is arranged on the top of the limit bracket, and a top cover is movably connected inside the bearing ring seat , the four sides of the inner bottom wall of the top cover are provided with blanking arc grooves, one side of the inner wall of the top cover is provided with a handle groove, the center of the inner bottom wall of the top cover is fixedly connected with a tapered frame, and the tapered The top of the rack is provided with top beads. The present invention can efficiently and stably through the set limit bracket, bearing ring seat, top cover, sleeve side seat, first fixed shaft seat, threaded rotating tube, second fixed shaft seat, lifting handle, motor table and driving motor. To complete the cement mixing operation, in the actual use process, the staff first pour the main cement raw materials that need to be mixed from the bearing ring seat into the interior of the material storage swivel seat, and then cover the top cover as a whole Connected to the inside of the bearing ring seat.

Description

Feed structure of a cement mixer

technical field

The invention relates to the technical field of cement mixing, in particular to a feed structure of a cement mixer.

Background technique

Cement is a powdery hydraulic inorganic gelling material. It can be mixed with water to form a slurry. It can be hardened in the air or in water, and can firmly bind sand, stone and other materials together. The mixture of early lime and volcanic ash and modern Lime pozzolanic cement is very similar to that of lime pozzolanic cement. Concrete made of crushed stones bonded with it not only has high strength after hardening, but also can resist the erosion of fresh water or salt water. For a long time, it has been used as an important cementing material and is widely used. In civil construction, water conservancy, national defense and other projects, cement is divided into uses and performances. General cement: cement usually used in general civil construction projects. General cement mainly refers to Portland cement, ordinary Portland cement, and slag silicate. Cement, pozzolanic Portland cement, fly ash Portland cement and composite Portland cement; special cement: cement with special properties or uses, such as G-grade oil well cement, rapid hardening Portland cement, road silicic acid Salt cement, aluminate cement, sulphoaluminate cement, etc. are also divided into two types: dry method and wet method. The dry method is to dry and grind the raw materials at the same time, or dry them first and then grind them into raw materials. The method of feeding the raw material powder into the dry kiln to calcine the clinker, but there is also a method of adding an appropriate amount of water to the raw material powder to make a raw material ball, and sending it into the Lipoer kiln to calcine the clinker, which is called the semi-dry method. It is still a kind of dry production. In wet production, the raw materials are added with water powder to grind the raw slurry, and then fed into the wet kiln to calcinate the clinker. There is also a method of dehydrating the raw slurry prepared by the wet method to make raw The method of calcining the clinker into the kiln is called the semi-wet method, which is still a kind of wet production. When cement is used, it usually needs to be stirred and mixed, and a cement mixer is used.

For example, the patent document with the notification number CN 111559004 B discloses a mixer for concrete that can suppress water evaporation, including a mixer body, a feed hopper, a sealing cover, a supporting leg, a stirring motor, a hydraulic telescopic rod, a control cabinet, a stirring Shaft, stirring blade, feed hole and discharge hole, the top of the side of the agitator body close to the sealing side plate is welded with a feed hopper, and the top shaft of the feed hopper is connected with a seal cover, and the inside of the feed hopper It communicates with the feeding hole on the top of the agitator body, and the support legs are welded on both sides of the bottom of the agitator body, and the support legs on the side of the agitator body close to the sealing side plate are fixedly connected with the adjustment seat, and the agitator motor The inner end of the mixer is connected to the stirring shaft inside the sealing side plate, and the middle part outside the stirring shaft is welded with stirring blades, and the outer end of the stirring shaft is welded with a support frame. The concrete agitator capable of suppressing water evaporation can realize the scraping of materials attached to the inner wall of the concrete agitator.

However, during the actual use of this structure, the staff usually can only start one main mixing structure, and then pour the rest of the raw materials that need to be mixed into the cement being stirred one by one. Such an operation cannot be realized The synchronous stirring operation of the raw materials that need to be mixed with the cement, as well as the first mixing and proportioning operation between some raw materials, lead to poor overall mixing effect after the subsequent raw materials are added to the cement mixer, and it takes longer In order to ensure the mixing uniformity of the cement, when the cement is being mixed as a whole, usually the stirring structure can only be stirred inside the container, and the overall mixing effect is poor, so that the overall cement cannot complete the mixing work more efficiently. It is not conducive to daily use, so there is an urgent need to design a feed structure for cement mixers to solve the above problems.

Contents of the invention

The purpose of the present invention is to provide a feed structure of a cement mixer, to solve the problem that the existing structure proposed in the above-mentioned background technology is in the actual use process, the staff usually can only start a main mixing structure, and then the rest The raw materials that need to be mixed are poured into the cement being stirred one by one. Such an operation cannot realize the synchronous mixing operation of the raw materials that need to be mixed with the cement, and the first mixing and proportioning operation between some raw materials. , resulting in poor overall mixing effect after the subsequent raw materials are added to the cement mixer, and a longer mixing operation is required to ensure the uniformity of cement mixing. At the same time, when mixing cement as a whole, usually only the mixing structure Stirring inside the container, the overall mixing effect is poor, resulting in the cement being unable to complete the mixing work more efficiently, which is not conducive to daily use problems.

In order to achieve the above object, the present invention provides the following technical solutions: a feeding structure of a cement mixer, including a limit bracket, the top of the limit bracket is provided with a bearing ring seat, and the inside of the bearing ring seat is flexibly connected with Top cover, the four sides of the inner bottom wall of the top cover are provided with blanking arc grooves, one side of the inner wall of the top cover is provided with a handle groove, the center of the inner bottom wall of the top cover is fixedly connected with a tapered frame, the The top of the conical frame is provided with a top bead, and the bottom of the top cover is fixedly connected with a first knife holder ring;

Socketing side seats, the four sides of the limit bracket are provided with socketing side seats, the inside of the socketing side seats is provided with a first fixed shaft seat, and the bottom end of the first fixed shaft seat is provided with a threaded rotating tube , the bottom end of the threaded rotating tube is provided with a second fixed shaft seat, the backs of the first fixed shaft seat and the second fixed shaft seat are fixedly connected with lifting handles, and the bottom of the sleeve side seat is fixedly connected with Support the side seat, one end of the support side seat is fixedly connected with a connecting rod, one end of the connecting rod is fixedly connected with a support base, the surface of the support base is fixedly connected with a motor platform, and the inside of the motor platform is provided with a drive motor.

Preferably, the front side of the sleeve side seat is provided with a communication groove, the back side of the sleeve side seat is provided with an adjustment groove, and the two sides of the inner wall of the adjustment groove are provided with supporting springs, and the two sides of the inner wall of the adjustment groove The side is movably connected with a fixing bar through a jacking spring.

Preferably, a docking frame is provided inside the limit bracket, movable shafts are provided at the upper and lower ends of the inner wall of the docking frame, and a transmission screw is movably connected to the inside of the docking frame through the movable shaft.

Preferably, the four corners of the inner wall of the first knife holder ring are provided with triangular arc-shaped blades, the surfaces of the triangular arc-shaped blades are provided with feeding holes, and the centers of the four sets of triangular arc-shaped blades are provided with central axes.

Preferably, the bottom end of the triangular arc-shaped blade is provided with a second knife rest ring, and the bottom of the second knife rest ring is provided with a supporting shaft frame.

Preferably, a storage swivel seat is provided at the bottom of the bearing ring seat, and the storage swivel seat fits with the first knife rest ring and the second knife rest ring.

Preferably, one end of the first fixed shaft seat and the threaded rotating tube is movably connected with a receiving drawer, and one end of the receiving drawer is provided with a baffle.

Preferably, the side of the bearing ring seat is fixedly connected with an outer ring seat, and the side of the outer ring seat is provided with thread grooves.

Preferably, the two corners of the inner wall of the limiting bracket are provided with limiting rolling balls, and the side of the bearing ring seat is provided with damping rubber rings, and the limiting rolling balls are matched with the damping rubber rings.

Compared with prior art, the beneficial effect of the present invention is:

The feeding structure of the cement mixer, through the set limit bracket, bearing ring seat, top cover, socket side seat, first fixed shaft seat, threaded rotating tube, second fixed shaft seat, pull handle, motor platform , driving motor, connecting tank, adjusting tank, jacking spring and fixing strip, can complete the cement mixing operation efficiently and stably. Pour the bearing ring seat into the interior of the material storage turntable, and then connect the top cover to the interior of the bearing ring seat, so that the stirring structure at the bottom of the top cover enters the interior of the storage turntable, and then start the motor The internal drive motor makes the drive motor drive the material storage turntable to perform stable rotation around the bearing ring seat inside the limit bracket, so that the inside of the bearing ring seat can be stirred efficiently while passing through the outer ring seat on the side of the bearing ring seat. And the thread groove can drive the transmission screw inside the docking frame to perform synchronous rotation operation with the bearing ring seat along the movable shaft at both ends, and then the rotating transmission screw drives the thread between the first fixed shaft seat and the second fixed shaft seat The rotating tube is rotated synchronously inside the sleeve side seat, and the daily staff can pull the pull handle so that the first fixed shaft seat, the threaded rotating tube and the second fixed shaft seat are integrally aligned with the jacking spring at the adjustment groove and The fixing bar is shrunk to realize the disconnection operation between the threaded rotary tube and the transmission screw, and then the first fixed shaft seat, the threaded rotary tube and the second fixed shaft seat are pulled upwards, and the whole is quickly lifted out of the sleeve side seat. At the same time, the feeding and discharging operation of the cement mixing raw material inside the threaded rotating tube is carried out through the receiving rack and baffle plate inside the first fixed shaft seat and the second fixed shaft seat, so as to quickly realize the mixing operation of the raw materials inside the threaded rotating tube. Improve the overall mixing effect of cement, reflecting the practicability of equipment design.

The feeding structure of the cement mixer, through the set bearing ring seat, top cover, cutting arc groove, conical frame, top ball, first knife holder ring, triangular arc blade, feeding hole, central shaft, second The tool holder ring, supporting shaft frame, receiving drawer, baffle plate, limit rolling ball and damping rubber ring further improve the overall use effect of the equipment. The cement raw material inside the material storage turntable, under the traction of centrifugal force, performs a rapid rotation operation, and continuously hits the surface of the triangular arc blade between the first tool holder ring and the second tool holder ring, and passes through the triangular arc. The blade performs a stirring operation, and the feeding hole opened on the surface of the triangular arc blade can realize the fast up and down conveying operation of the cement, so that the cement raw material can be quickly rolled up and down around the central axis, and this design is always the cement raw material. The up and down stirring operation does not appear like the stirring paddle structure, and the cement at some four corners cannot be stirred, which improves the overall mixing effect. The same structural design is adopted inside the threaded rotating tube, so that the cement raw materials can be efficiently and stably stirred. At the same time When the proportioned cement raw material comes to the top of the top cover along the receiving rack, it can fall on the conical frame and top beads inside the top cover, and through the conical frame and top beads, it will be uniformly and quickly discharged from the arc groove of the material. The unloading operation ensures that it can be stirred quickly inside the material storage turntable. When the limit bracket, bearing ring seat and top cover are rotated as a whole, the limit rolling ball on the inner wall of the limit bracket and the damping on the side of the bearing ring seat are used. The rubber ring can perform adaptive damping operation to improve the overall rotation stability, reflecting the comprehensiveness of the equipment design.

Description of drawings

Fig. 1 is the three-dimensional schematic view of structure of the present invention;

Fig. 2 is the overall schematic diagram of the space-limiting bracket structure of the present invention;

Fig. 3 is the overall schematic view of the structure of the threaded pipe of the present invention;

Fig. 4 is the overall schematic diagram of the socket side seat structure of the present invention;

Fig. 5 is an overall schematic diagram of the structure of the bearing ring seat of the present invention;

Fig. 6 is the overall schematic diagram of the first tool holder ring structure of the present invention;

Fig. 7 is the overall schematic diagram of the motor table structure of the present invention;

FIG. 8 is an enlarged schematic diagram of the structure at A in FIG. 1 of the present invention.

In the figure: 1. Limiting bracket; 2. Bearing ring seat; 3. Top cover; 4. Cutting arc groove; 5. Handle groove; 6. Tapered frame; 9. Sleeve side seat; 10. First fixed shaft seat; 11. Threaded rotating tube; 12. Second fixed shaft seat; 13. Pull handle; 14. Support side seat; 15. Connecting rod; 16. Support base ; 17, motor table; 18, driving motor; 19, communication slot; 20, adjustment slot; 21, top solid spring; 22, fixed bar; 23, docking frame; 24, movable shaft; 25, transmission screw; 26, triangle Arc blade; 27, feeding hole; 28, central axis; 29, second tool holder ring; 30, supporting shaft frame; 31, storage swivel seat; 32, receiving drawer; Outer ring seat; 35, thread groove; 36, limit rolling ball; 37, damping rubber ring.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Fig. 1-8, a kind of embodiment provided by the present invention:

A feeding structure of a cement mixer, the bearing ring seat 2 used in this application, the first fixed shaft seat 10, the second fixed shaft seat 12, the drive motor 18, the jacking spring 21, the movable shaft 24, the triangular arc The blade 26 and the central shaft 28 are products directly available on the market, and its principle and connection mode are all prior art well known to those skilled in the art, including a spacer bracket 1, and a bearing ring seat is arranged on the top of the spacer bracket 1 2. The inside of the bearing ring seat 2 is movably connected with a top cover 3, and the four sides of the inner bottom wall of the top cover 3 are provided with blanking arc grooves 4, and one side of the inner wall of the top cover 3 is provided with a handle groove 5, and the inner bottom wall of the top cover 3 The center of the shaft is fixedly connected with a conical frame 6, the top of the conical frame 6 is provided with a top bead 7, the bottom of the top cover 3 is fixedly connected with a first knife holder ring 8, and the bottom of the bearing ring seat 2 is provided with a storage swivel seat 31, The material storage swivel seat 31 is compatible with the first knife rest ring 8 and the second knife rest ring 29, and one end of the first fixed shaft seat 10 and the threaded rotating tube 11 is movably connected with a receiving drawer 32, and the receiving drawer One end of the frame 32 is provided with a baffle plate 33, the side of the bearing ring seat 2 is fixedly connected with an outer ring seat 34, the side of the outer ring seat 34 is provided with a thread groove 35, and the two corners of the inner wall of the limit bracket 1 are provided with limit rolling balls 36 , the side of the bearing ring seat 2 is provided with a damping rubber ring 37, the limit ball 36 is matched with the damping rubber ring 37, and the internal driving motor 18 of the starting motor platform 17 is arranged, so that the driving motor 18 drives the storage turntable 31 As a whole, the bearing ring seat 2 is stably rotated inside the limit bracket 1, so that the inside of the bearing ring seat 2 is efficiently stirred, and the outer ring seat 34 and the thread groove 35 on the side of the bearing ring seat 2 can drive the docking The transmission screw 25 inside the frame 23 performs a synchronous rotation operation with the bearing ring seat 2 along the movable shaft 24 at both ends, and then the rotating transmission screw 25 drives the first fixed shaft seat 10 and the second fixed shaft seat 12. The threaded rotating tube 11 performs a synchronous rotation operation inside the sleeve side seat 9 .

Socket side seat 9, the four sides of the limit bracket 1 are provided with socket side seat 9, the inside of the socket side seat 9 is provided with a first fixed shaft seat 10, and the bottom end of the first fixed shaft seat 10 is provided with a threaded rotating tube 11. The bottom end of the threaded rotating tube 11 is provided with a second fixed shaft seat 12, the back of the first fixed shaft seat 10 and the second fixed shaft seat 12 are fixedly connected with a lifting handle 13, and the bottom of the socket side seat 9 is fixedly connected There is a support side seat 14, one end of the support side seat 14 is fixedly connected with a connecting rod 15, one end of the connecting rod 15 is fixedly connected with a support base 16, the surface of the support base 16 is fixedly connected with a motor platform 17, and the inside of the motor platform 17 is provided with Drive motor 18, the front of sleeve side seat 9 is provided with communicating groove 19, and the back side of sleeve side seat 9 is provided with adjustment groove 20, and the both sides of adjustment groove 20 inner walls are provided with jacking spring 21, and the two sides of adjustment groove 20 inner walls The side is movably connected with a fixed bar 22 through a top-fixing spring 21, a docking frame 23 is arranged inside the limit bracket 1, and a movable shaft 24 is provided at the upper and lower ends of the inner wall of the docking frame 23, and the inside of the docking frame 23 is movably connected by a movable shaft 24. Drive screw rod 25 is arranged, the four corners of the inner wall of the first tool holder ring 8 are provided with triangular arc blades 26, the surfaces of the triangular arc blades 26 are provided with feeding holes 27, and the centers of four groups of triangular arc blades 26 are provided with central shafts 28, The bottom end of the triangular arc blade 26 is provided with a second knife rest ring 29, and the bottom of the second knife rest ring 29 is provided with a supporting shaft frame 30. After the material storage swivel seat 31 rotates, the inside of the storage material swivel seat 31 will Under the traction of the centrifugal force, the cement raw material performs a rapid rotation operation, and continuously strikes the surface of the triangular arc-shaped blade 26 between the first knife rest ring 8 and the second knife rest ring 29, and the triangular arc-shaped blade 26 Stirring operation, the feeding hole 27 opened on the surface of the triangular arc-shaped blade 26 can realize the fast up and down conveying operation of cement, so that the cement raw material can be quickly rolled up and down around the central axis 28, and this design is always carried out by the cement raw material Comprehensive up and down agitation operation.

Working principle: When in use, the user first pours the main cement raw materials that need to be stirred from the bearing ring seat 2 into the interior of the material storage rotating seat 31, and then connects the top cover 3 to the interior of the bearing ring seat 2 , so that the stirring structure at the bottom of the top cover 3 enters the inside of the storage turntable 31, at this time, the internal drive motor 18 of the motor platform 17 is started, so that the drive motor 18 drives the storage turntable 31 as a whole to surround the bearing ring seat 2 within a limit The inside of the bit bracket 1 is stably rotated, so that the inside of the bearing ring seat 2 is efficiently stirred, and the outer ring seat 34 and the thread groove 35 on the side of the bearing ring seat 2 can drive the transmission screw 25 inside the docking frame 23 along the The movable shaft 24 at both ends performs a synchronous rotation operation with the bearing ring seat 2, and then the rotating drive screw 25 drives the threaded rotating tube 11 between the first fixed shaft seat 10 and the second fixed shaft seat 12 to connect with the side seat The inside of 9 performs synchronous rotation operation, and the daily staff can pull the pull handle 13, so that the first fixed shaft seat 10, the threaded rotating tube 11 and the second fixed shaft seat 12 are integrally aligned with the top fixing spring 21 at the adjustment groove 20 and The fixing bar 22 shrinks to realize the disconnection operation between the threaded rotary tube 11 and the transmission screw 25, and then pulls up the first fixed shaft seat 10, the threaded rotary tube 11 and the second fixed shaft seat 12 as a whole to quickly lift the whole The side seat 9 is socketed, and at this time, the material receiving drawer 32 and the baffle plate 33 inside the first fixed shaft seat 10 and the second fixed shaft seat 12 are used to carry out the feeding and discharging operation of the cement mixed raw material inside the threaded rotating tube 11, and the operation is fast. Realize the mixing operation of raw materials inside the threaded rotating tube 11, and improve the overall mixing effect on cement. Under the traction of centrifugal force, carry out fast rotation operation, constantly strike to the triangular arc-shaped blade 26 surface between the first knife rest ring 8 and the second knife rest ring 29, carry out agitation operation by triangular arc-shaped blade 26, triangle The delivery hole 27 opened on the surface of the arc-shaped blade 26 can realize the fast up and down conveying operation of the cement, so that the cement raw material can be quickly rolled up and down around the central axis 28, and this design is always for the cement raw material to be fully agitated up and down The operation will not be like the stirring paddle structure, and the cement at the four corners cannot be stirred, and the overall mixing effect will be improved. The same structural design is adopted inside the threaded rotating tube 11, so that the cement raw materials can be mixed efficiently and stably. Ratio cement raw material arrives at the top of the top cover 3 along the receiving rack 32, can fall on the conical frame 6 and the top bead 7 inside the top cover 3, and pass through the conical frame 6 and the top bead 7 from the discharge arc groove The uniform and fast feeding operation is carried out at 4 places to ensure that it can quickly get the stirring operation inside the material storage turntable 31. The limit rolling ball 36 and the damping rubber ring 37 on the side of the bearing ring seat 2 can perform adaptive damping operations to improve the overall rotation stability. The above is the entire working principle of the present invention.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (9)

1. The utility model provides a feeding structure of cement mixer, includes spacing support (1), its characterized in that: the top of the limit bracket (1) is provided with a bearing ring seat (2), the inside of the bearing ring seat (2) is movably connected with a top cover (3), four edges of the inner bottom wall of the top cover (3) are provided with blanking arc grooves (4), one side of the inner wall of the top cover (3) is provided with a handle groove (5), the center of the inner bottom wall of the top cover (3) is fixedly connected with a conical frame (6), the top of the conical frame (6) is provided with a top bead (7), and the bottom of the top cover (3) is fixedly connected with a first tool rest ring (8);

cup jointed side seat (9), the four sides of spacing support (1) are provided with cup joints side seat (9), the inside of cup jointing side seat (9) is provided with first fixed axle seat (10), the bottom of first fixed axle seat (10) is provided with screw thread commentaries on classics pipe (11), the bottom of screw thread commentaries on classics pipe (11) is provided with second fixed axle seat (12), the back fixedly connected with of first fixed axle seat (10) and second fixed axle seat (12) carries handle (13), the bottom fixedly connected with of cup jointing side seat (9) supports side seat (14), the one end fixedly connected with connecting rod (15) of supporting side seat (14), the one end fixedly connected with supporting base (16) of connecting rod (15), the fixed surface connection of supporting base (16) has motor platform (17), the inside of motor platform (17) is provided with driving motor (18).

2. A cement mixer feed structure according to claim 1, wherein: the front of cup jointing side seat (9) has seted up intercommunication groove (19), the adjustment tank (20) have been seted up to the back of cup jointing side seat (9), the both sides of adjustment tank (20) inner wall are provided with top solid spring (21), the both sides of adjustment tank (20) inner wall are through top solid spring (21) swing joint have fixed strip (22).

3. A cement mixer feed structure according to claim 1, wherein: the inside of spacing support (1) is provided with butt joint frame (23), the upper and lower both ends of butt joint frame (23) inner wall are provided with loose axle (24), the inside of butt joint frame (23) is through loose axle (24) swing joint has drive screw (25).

4. A cement mixer feed structure according to claim 1, wherein: the four corners of the inner wall of the first tool rest ring (8) are provided with triangular arc-shaped blades (26), the surfaces of the triangular arc-shaped blades (26) are provided with feeding holes (27), and the centers of the four groups of triangular arc-shaped blades (26) are provided with a central shaft (28).

5. A cement mixer feed structure according to claim 4, wherein: the bottom of triangle arc blade (26) is provided with second knife rest ring (29), the bottom of second knife rest ring (29) is provided with support pedestal (30).

6. A cement mixer feed structure according to claim 4, wherein: the bottom of bearing ring seat (2) is provided with storage swivel mount (31), the mutual adaptation between storage swivel mount (31) and first knife rest ring (8) and second knife rest ring (29).

7. A cement mixer feed structure according to claim 1, wherein: one end of the first fixed shaft seat (10) and one end of the threaded rotary pipe (11) are movably connected with a material collecting and drawing frame (32), and one end of the material collecting and drawing frame (32) is provided with a baffle plate (33).

8. A cement mixer feed structure according to claim 1, wherein: the side of the bearing ring seat (2) is fixedly connected with an outer ring seat (34), and the side of the outer ring seat (34) is provided with a thread groove (35).

9. A cement mixer feed structure according to claim 1, wherein: limiting rolling balls (36) are arranged at two corners of the inner wall of the limiting support (1), damping rubber rings (37) are arranged on the side faces of the bearing ring seat (2), and the limiting rolling balls (36) are matched with the damping rubber rings (37).

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